Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 139
tor. It is the difference in temperature of the air in the twobulbs which causes the flow ol the liquid. Any change in e.xternal temperature causesequal effect in both bulbs and therefore does not affect the reading. 558 HAWKINS ELECTRICITY Ques. Explain the operation of the Siemens… … Figs. 651 and ti.)2.—Weston illuminated dial station voltmeter and an-.r:e:er. The voltmeterhas two indices, a pointed index for close readings and an index called the normdl indfx.which enables a slight deviation from the normal voltage to be seen from a long distanciThe normal index is inside the…
Electrical engineering
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